JSON to CSV with Python Error with keys that doesn't exist答案

【问题标题】：JSON to CSV with Python Error with keys that don't exsitJSON to CSV with Python Error with keys that doesn't exist
【发布时间】：2021-08-05 08:10:28
【问题描述】：

我想将 JSON 数据转换为 csv 文件，问题是并非所有数据都相同，它们的键也不相同。我设法手动打印了第一行键名，然后我调用了相应键的每个值。

我的代码：

import json
import csv

with open("./res.json") as file:
    data = json.load(file)

file_name = "output.csv"

with open(file_name, "w") as file:
    csv_file = csv.writer(file)
    csv_file.writerow(["Account_Name__c", "License_Address__c", "Operating_Name__c", "Property_Location__c", "License_Address_for_Business_Directroy__c", "License_Status__c", "Account__c", "Building__c", "Longitude__c", "Latitude__c", "Id", "CurrencyIsoCode", "Property_Location__r"])
    if "resultData" in data:
        for item in data["resultData"]:
            csv_file.writerow([item['Account_Name__c'], item['License_Address__c'], item['Operating_Name__c'], item['Property_Location__c'], item['License_Address_for_Business_Directroy__c'], item['License_Status__c'], item['Account__c'], item['Building__c'], item['Longitude__c'], item['Latitude__c'], item['Id'], item['CurrencyIsoCode'], item['Property_Location__r']])

数据样本：

{
  "resultData": [
    {
      "Account_Name__c": "ZURI FLOWERS DMCC",
      "License_Address__c": "Unit No: 2201<br>Tiffany Towers<br>Plot No: JLT-PH2-W2A<br>Jumeirah Lakes Towers<br>Dubai<br>UAE",
      "Operating_Name__c": "001b000000MV4EnAAL",
      "Property_Location__c": "a1G10000000XLRNEA4",
      "License_Address_for_Business_Directroy__c": "Unit No: 2201<br>Tiffany Towers<br>Jumeirah Lakes Towers<br>Dubai<br>UAE",
      "License_Status__c": "Active",
      "Account__c": "001b000000MV4EnAAL",
      "Building__c": "Tiffany Towers",
      "Longitude__c": "55.14960835",
      "Latitude__c": "25.07726334",
      "Id": "a03b0000006h0Y7AAI",
      "CurrencyIsoCode": "AED",
      "Operating_Name__r": {
        "Name": "ZURI FLOWERS DMCC",
        "Id": "001b000000MV4EnAAL",
        "RecordTypeId": "01210000000a3e5AAA",
        "CurrencyIsoCode": "AED"
      },
      "Property_Location__r": {
        "Name": "PL-017352",
        "Function_Type_Class__c": "Office",
        "Id": "a1G10000000XLRNEA4",
        "RecordTypeId": "01210000000YFA3AAO",
        "CurrencyIsoCode": "AED"
      },
      "Account__r": {
        "Publishing_agreement_for_BD__c": "Publish all details in DMCC online/printed content",
        "Name": "ZURI FLOWERS DMCC",
        "Phone_BD__c": "+971506570630",
        "Company_Website_Address__c": "01:00",
        "Company_Official_Email_Address__c": "kakaji1@gmail.com",
        "Saturday_From__c": "Closed",
        "Saturday_To__c": "Closed",
        "Operating_Time_from_regular__c": "09:00 AM",
        "Operating_Time_to_regular__c": "05:00 PM",
        "Monday_From__c": "09:00 AM",
        "Monday_To__c": "05:00 PM",
        "Tuesday_From__c": "09:00 AM",
        "Tuesday_To__c": "05:00 PM",
        "Wednesday_From__c": "09:00 AM",
        "Wednesday_To__c": "05:00 PM",
        "Thursday_From__c": "09:00 AM",
        "Thursday_To__c": "04:00 PM",
        "Friday_From__c": "Closed",
        "Friday_To__c": "Closed",
        "Id": "001b000000MV4EnAAL",
        "RecordTypeId": "01210000000a3e5AAA",
        "CurrencyIsoCode": "AED"
      }
    },
    {
      "Account_Name__c": "ZYDUS WORLDWIDE DMCC",
      "License_Address__c": "Unit No: 908<br>Armada 2<br>Plot No: JLT-PH2-P2A<br>Jumeirah Lakes Towers<br>Dubai<br>UAE",
      "Operating_Name__c": "0011000000jkjT1AAI",
      "Property_Location__c": "a1G10000000XKCCEA4",
      "License_Address_for_Business_Directroy__c": "Unit No: 908<br>Armada 2<br>Jumeirah Lakes Towers<br>Dubai<br>UAE",
      "License_Status__c": "Active",
      "Account__c": "0011000000jkjT1AAI",
      "Building__c": "Armada 2",
      "Longitude__c": "55.14552528",
      "Latitude__c": "25.07481256",
      "Id": "a031000000M6HQ6AAN",
      "CurrencyIsoCode": "AED",
      "Operating_Name__r": {
        "Name": "ZYDUS WORLDWIDE DMCC",
        "Id": "0011000000jkjT1AAI",
        "RecordTypeId": "01210000000a3e5AAA",
        "CurrencyIsoCode": "AED"
      },
      "Property_Location__r": {
        "Name": "PL-012567",
        "Function_Type_Class__c": "Office",
        "Id": "a1G10000000XKCCEA4",
        "RecordTypeId": "01210000000YFA3AAO",
        "CurrencyIsoCode": "AED"
      },
      "Account__r": {
        "Publishing_agreement_for_BD__c": "Publish only name and address in DMCC online/printed content",
        "Name": "ZYDUS WORLDWIDE DMCC",
        "Phone_BD__c": "+97143998182",
        "Website": "www.zyduscadila.com",
        "Company_Official_Email_Address__c": "ketanbhut@zydusworldwide.ae",
        "Saturday_From__c": "Closed",
        "Saturday_To__c": "Closed",
        "Operating_Time_from_regular__c": "09:00 AM",
        "Operating_Time_to_regular__c": "06:00 PM",
        "Monday_From__c": "09:00 AM",
        "Monday_To__c": "06:00 PM",
        "Tuesday_From__c": "09:00 AM",
        "Tuesday_To__c": "06:00 PM",
        "Wednesday_From__c": "09:00 AM",
        "Wednesday_To__c": "06:00 PM",
        "Thursday_From__c": "09:00 AM",
        "Thursday_To__c": "06:00 PM",
        "Friday_From__c": "Closed",
        "Friday_To__c": "Closed",
        "Id": "0011000000jkjT1AAI",
        "RecordTypeId": "01210000000a3e5AAA",
        "CurrencyIsoCode": "AED"
      }
    },
    {
      "Account_Name__c": "ZYLIN TECHNOLOGIES DMCC",
      "License_Address__c": "Unit No: 3O-01-2357<br>Jewellery &amp; Gemplex 3<br>Plot No: DMCC-PH2-J&amp;GPlexS<br>Jewellery &amp; Gemplex<br>Dubai<br>United Arab Emirates",
      "Property_Location__c": "a1G10000001X1gHEAS",
      "License_Status__c": "Active",
      "Account__c": "0015F00001NOV3iQAH",
      "Building__c": "55.13646334",
      "Id": "a035F00001K4be6QAB",
      "CurrencyIsoCode": "AED",
      "Property_Location__r": {
        "Name": "PL-128190",
        "Function_Type_Class__c": "Flexi Desk",
        "Id": "a1G10000001X1gHEAS",
        "RecordTypeId": "01210000000YFA5AAO",
        "CurrencyIsoCode": "AED"
      },
      "Account__r": {
        "Publishing_agreement_for_BD__c": "Publish all details in DMCC online/printed content",
        "Name": "ZYLIN TECHNOLOGIES DMCC",
        "Phone_BD__c": "+971504569106",
        "Company_Official_Email_Address__c": "ziad@zylintech.com",
        "Saturday_From__c": "Closed",
        "Saturday_To__c": "Closed",
        "Operating_Time_from_regular__c": "09:00 AM",
        "Operating_Time_to_regular__c": "05:00 PM",
        "Monday_From__c": "09:00 AM",
        "Monday_To__c": "05:00 PM",
        "Tuesday_From__c": "09:00 AM",
        "Tuesday_To__c": "05:00 PM",
        "Wednesday_From__c": "09:00 AM",
        "Wednesday_To__c": "05:00 PM",
        "Thursday_From__c": "09:00 AM",
        "Thursday_To__c": "05:00 PM",
        "Friday_From__c": "Closed",
        "Friday_To__c": "Closed",
        "Id": "0015F00001NOV3iQAH",
        "RecordTypeId": "01210000000a3e5AAA",
        "CurrencyIsoCode": "AED"
      }
    },
    {
      "Account_Name__c": "ZYLWAY DMCC",
      "License_Address__c": "Unit No: 3O-01-3360<br>Jewellery &amp; Gemplex 3<br>Plot No: DMCC-PH2-J&amp;GPlexS<br>Jewellery &amp; Gemplex<br>Dubai<br>United Arab Emirates",
      "Property_Location__c": "a1G5F000002KAF5UAO",
      "License_Status__c": "Active",
      "Account__c": "0015F00001TmYjTQAV",
      "Building__c": "55.13646334",
      "Id": "a035F00001TS4hiQAD",
      "CurrencyIsoCode": "AED",
      "Property_Location__r": {
        "Name": "PL-357158",
        "Function_Type_Class__c": "Flexi Desk",
        "Id": "a1G5F000002KAF5UAO",
        "RecordTypeId": "01210000000YFA5AAO",
        "CurrencyIsoCode": "AED"
      },
      "Account__r": {
        "Name": "ZYLWAY DMCC",
        "Phone_BD__c": "+971564158834",
        "Id": "0015F00001TmYjTQAV",
        "RecordTypeId": "01210000000a3e5AAA",
        "CurrencyIsoCode": "AED"
      }
    },
    {
      "Account_Name__c": "ZYMENON UDSTYRE CONSULTING DMCC",
      "License_Address__c": "Unit No: 2H-05-124<br>Jewellery &amp; Gemplex 2<br>Plot No: DMCC-PH2-J&amp;GPlexS<br>Jewellery &amp; Gemplex<br>DUBAI<br>United Arab Emirates",
      "Property_Location__c": "a1G10000000XGmnEAG",
      "License_Status__c": "Active",
      "Account__c": "0011000000xig08AAA",
      "Building__c": "55.13603472",
      "Id": "a031000000YrBUGAA3",
      "CurrencyIsoCode": "AED",
      "Property_Location__r": {
        "Name": "PL-001899",
        "Function_Type_Class__c": "Flexi Desk",
        "Id": "a1G10000000XGmnEAG",
        "RecordTypeId": "01210000000YFA5AAO",
        "CurrencyIsoCode": "AED"
      },
      "Account__r": {
        "Publishing_agreement_for_BD__c": "Publish only name and address in DMCC online/printed content",
        "Name": "ZYMENON UDSTYRE CONSULTING DMCC",
        "Phone_BD__c": "+97144320400",
        "Company_Official_Email_Address__c": "tasawar.hussayn@panoramaconsulting.ae",
        "Saturday_From__c": "Closed",
        "Saturday_To__c": "Closed",
        "Operating_Time_from_regular__c": "09:00 AM",
        "Operating_Time_to_regular__c": "05:00 PM",
        "Monday_From__c": "09:00 AM",
        "Monday_To__c": "05:00 PM",
        "Tuesday_From__c": "09:00 AM",
        "Tuesday_To__c": "05:00 PM",
        "Wednesday_From__c": "09:00 AM",
        "Wednesday_To__c": "05:00 PM",
        "Thursday_From__c": "09:00 AM",
        "Thursday_To__c": "05:00 PM",
        "Friday_From__c": "Closed",
        "Friday_To__c": "Closed",
        "Id": "0011000000xig08AAA",
        "RecordTypeId": "01210000000a3e5AAA",
        "CurrencyIsoCode": "AED"
      }
    },
    {
      "Account_Name__c": "ZYWA PAYMENTS DMCC",
      "License_Address__c": "Unit No: 3306-1<br>Mazaya Business Avenue BB1<br>Plot No: JLTE-PH2-BB1<br>Jumeirah Lakes Towers<br>Dubai<br>UAE",
      "Property_Location__c": "a1G10000001W6LgEAK",
      "License_Address_for_Business_Directroy__c": "Unit No: 3306-1<br>Mazaya Business Avenue BB1<br>Jumeirah Lakes Towers<br>Dubai<br>UAE",
      "License_Status__c": "Active",
      "Account__c": "0015F00001VsGJFQA3",
      "Building__c": "55.1450717",
      "Longitude__c": "55.1450717",
      "Latitude__c": "25.06828081",
      "Id": "a035F00001ZVZS0QAP",
      "CurrencyIsoCode": "AED",
      "Property_Location__r": {
        "Name": "PL-102042",
        "Function_Type_Class__c": "BC Office 4",
        "Id": "a1G10000001W6LgEAK",
        "RecordTypeId": "01210000000YFA5AAO",
        "CurrencyIsoCode": "AED"
      },
      "Account__r": {
        "Name": "ZYWA PAYMENTS DMCC",
        "Phone_BD__c": "+971509708621",
        "Id": "0015F00001VsGJFQA3",
        "RecordTypeId": "01210000000a3e5AAA",
        "CurrencyIsoCode": "AED"
      }
    }
  ]
}

pycharm 会出现这个错误：

Traceback（最近一次调用最后一次）：文件“../json_to_csv.py”，第 14 行，在 csv_file.writerow([item['Account_Name__c']，item['License_Address__c']，item['Operating_Name__c']，item['Property_Location__c']，item['License_Address_for_Business_Directroy__c']，item['License_Status__c']，item[' Account__c']，item['Building__c']，item['Longitude__c']，item['Latitude__c']，item['Id']，item['CurrencyIsoCode']，item['Property_Location__r']]） KeyError: 'Operating_Name__c'

【问题讨论】：

标签： python json csv

【解决方案1】：

Operating_name_c 似乎没有密钥。 Operating_name__r 有一个密钥。

【讨论】：

【解决方案2】：

最好的解决方案是先扫描所有记录并收集所有可能的键：

all_keys = set()
for item in data["resultData"]:
    all_keys |= item.keys()

之后，all_keys 将包含所有可能的值，即 CSV 的所有列。

if "resultData" in data:
    all_keys = set()
    for item in data["resultData"]:
        all_keys |= item.keys()
    for item in data["resultData"]:
            csv_file.writerow([item.get(k) for k in all_keys ])

【讨论】：